Fix lint warnings (#319)

* Fix lint errors/warnings

Fix a lot of lint errors and warnings.
Most things are automatically applied fixes done with android studio:

* externalize strings
* remove unused code / classes / layouts / imports
* migrate some fields to local variables

* Remove dead code from comments

Removed code that is commented out long ago.

* remove unused resources

* colors
* strings
* drawables
* layouts
* menus

1 files changed, 0 insertions, 158 deletions

diff --git a/app/src/main/res/layout/openpgp_provider.xml b/app/src/main/res/layout/openpgp_provider.xml
deleted file mode 100644
index f7c46b5f..00000000
--- a/app/src/main/res/layout/openpgp_provider.xml
+++ /dev/null
@@ -1,158 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
-android:id="@+id/parent_scroll"
-android:fillViewport="true"
-android:layout_width="match_parent"
-android:layout_height="match_parent">
-
-<LinearLayout
-    android:padding="8dp"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:orientation="vertical">
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Encrypt UserIds (split with &apos;,&apos;)"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-
-    <EditText
-        android:id="@+id/crypto_provider_demo_encrypt_user_id"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="dominik@dominikschuermann.de"
-        android:textAppearance="@android:style/TextAppearance.Small" />
-
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Message"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-
-    <ScrollView
-        android:id="@+id/child_scroll1"
-        android:fillViewport="true"
-        android:layout_width="match_parent"
-        android:layout_height="120dp">
-
-        <EditText
-            android:id="@+id/crypto_provider_demo_message"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:scrollHorizontally="true"
-            android:scrollbars="vertical"
-            android:text="message"
-            android:hint="cleartext message"
-            android:textAppearance="@android:style/TextAppearance.Small" />
-    </ScrollView>
-
-    <TextView
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Ciphertext"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <ScrollView
-        android:id="@+id/child_scroll2"
-        android:fillViewport="true"
-        android:layout_width="match_parent"
-        android:layout_height="120dp">
-
-        <EditText
-            android:id="@+id/crypto_provider_demo_ciphertext"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:text="ciphertext"
-            android:hint="ciphertext"
-            android:textAppearance="@android:style/TextAppearance.Small" />
-    </ScrollView>
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-        <Button
-            android:id="@+id/crypto_provider_demo_sign"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Sign"
-            android:layout_gravity="center_vertical" />
-
-        <Button
-            android:id="@+id/crypto_provider_demo_encrypt"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Encrypt"
-            android:layout_gravity="center_vertical" />
-
-        <Button
-            android:id="@+id/crypto_provider_demo_sign_and_encrypt"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:text="Sign and Encrypt"
-            android:layout_gravity="center_vertical" />
-    </LinearLayout>
-
-    <Button
-        android:id="@+id/crypto_provider_demo_decrypt_and_verify"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Decrypt and Verify" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Account ID:"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Alice &lt;alice@example.com&gt;"
-        android:id="@+id/crypto_provider_demo_account" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Get key:"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="0x718c070100012282"
-        android:id="@+id/crypto_provider_demo_get_key_edit" />
-
-    <Button
-        android:id="@+id/crypto_provider_demo_get_key"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Get key" />
-
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Get key ids:"
-        android:textAppearance="?android:attr/textAppearanceMedium" />
-
-    <EditText
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="dominik@dominikschuermann.de"
-        android:id="@+id/crypto_provider_demo_get_key_ids_edit" />
-
-    <Button
-        android:id="@+id/crypto_provider_demo_get_key_ids"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Get key ids" />
-
-</LinearLayout>
-</ScrollView>
\ No newline at end of file